Aer Lingus will attend talks facilitated by the Labour Relations Commission tomorrow in an attempt to resolve a dispute with pilots over rostering arrangements.
It follows a decision by the Irish Airline Pilots' Association to notify Aer Lingus of its intention to begin industrial action next Tuesday.
Work rosters have become a familiar battleground for Aer Lingus and its staff.
Both cabin crew and pilots balloted for industrial action over new flexible working arrangements instituted by the airline, which workers saw as inflexible.
Subsequent industrial action by cabin crew in January led to flight cancellations and to Aer Lingus temporarily removing some staff from the payroll, before both sides resolved differences at the Labour Relations Commission.
The LRC is the forum again tomorrow as pilots threaten to begin showing up an hour late for their shifts.
They also plan to withdraw flexible arrangements that saw pilots work on free days whether rostered or not if they were required by the airline.
Aer Lingus warns that such action would be seriously disruptive to its schedule and could lead to a complete cancellation of services from Tuesday.